Telephone switchboard



Sept. 19, 1933. G, Rl EATON 1,927,514

TELEPHONE SWI TCHBOARD Sept 19, 1933- l G. R. EATON 1,927,514

TELEPHONE SWITCHBOARD Filed Oct. 11, 1950 2 Sheets-Sheet 2 PatentedSept. 19, 1933` 1,927,514 TELEPHONE SWITCHBOARD,

- George R. Eaton, Oak Park, Ill., assigner to Kellogg Switchboard andSupplyV Company,

Chicago, Ill., a corporation of Illinois Y Application oompa; 11, 1930.serial No. 488,031

v claims.

Myv invention relates to central ofce telephone switchboards, and anobject of myinvention is to provide a telephone switchboard irl-whichthe equipment local to each section maybe asseml bled, wiredandconnected `in a factory, "shipped as a unit tothe place ofinstallation, and there attached to the framework of the switchboard.

A further object of my invention istoprovide a telephone switchboardfromk which the equipment local to each section may beremoved as aunityand replaced withk other local equipment,

also as aunit, when it is desired to make a change in this equipment.For instancea sectionrnay be originally equipped with apparatusforcompleting local calls and later toll equipment `is desired in thesection.` It is a simple matter in-the switchboard of my invention toremove therelay rack, cord yrack and keyshelf constituting the localequipment and substitute toll equipment in thev either or both ends witha minimum of labor vand material-` Furtherfobjects and advantages of. myinvention will appear from the following description,

reference being had to the accompanying draw f ings in which Fig. l isarear view of one section of my 'switchf board, with the cover panelremoved;

` Fig. 2 is an end view, with the end panel .removed; f

Fig. 3 is a rear View of parts of two adjoining sections, showing themethod of placing sections side by side, using one leg to support bothsections;

Fig. 4 is a plan view of the key and cord shelf, with certain equipmentin place;

Fig. 5 is an elevation of Fig. 4;

Fig. 6 is a plan view of the cord rack, showing the method of installingit in the framework;

Fi". 7 is an elevation of Fig. 6;

Fig. 8 is a plan view of the operators coil and miscellaneous rack and aportion of Aan adjoining miscellaneous rack, installed in the framework;

' Fig. 9 is an elevation of Fig. 8; and y Fig. 10 is a perspective Viewof the keyshelf,

cordshelf, cord rack, miscellaneous rack and re lay gate, as wired andconnected in the factoryv and shipped to the place of installation.

,inv place by the drop catch 3l.

required turnsto Vthe V:.eyshelf 34, the rack 36and Referring new to thedrawings, the` switchboard of my invention consists of a lseries ofsections placed side by side and each section includes a supporting unitor framework preferably formed of metal which supports an operating unitcomprising a keyshelf 34 carrying the usual keys 6G, a plug shelf 35 forsupporting the plugs 6l when the same are not in use, a rack 36 adapt'-ed to support miscellaneous equipment such inthe battery leads to thecords, the induction or repeating coil `of the operators set and thelikeahd a cord rack 38. v

A sliding door 2o serves as a cover for the back of the switchboard andas a means'of gainingxaccess to the interior for adjustments,replacements, or similar purposes.. One such door is provided for cachsection of the switchboard. Strips of wood 2l, 22 and 23 are arranged toform a-groove 24 in which the top of the door 20 vmay slide. 25 is astrip of wood provided with the groove 26 in which the bottom of thedoor 20 may slide. As shown in Fig. 3, these grooved members are formedof continuous strips along the entire back of the switchboard assembly,servingxalso as one means of holding the various sections together, andare placed in position after the switchboards are installed. At 27 is anupright" angle iron which, with the horizontal angle irons or stringers45 and 4G, supports the relay gate 28, which-is pivoted on the Ypins 29and 30y and held The relays 32 may be any desired number and style, andareV wired to the cable 33 through the back of the relay gate 28.Galilei-33 is carried through any the cord rackv33. The plug shelf 35 isattached to the framework of the switchboard by the screws 39 and thekeyshelf 34. is joined to the plug shelf 35 by the piano hinge 37, whichpermits the keyshelf 34 to be raised from the framework of theswitchboard for inspection or repairs. The cord rack V38 is attached tothe framework of the switchboard by the screws 49 and the bolts 41. Therack 36 is .attached to the framework of the switchboard by ythe bolts42. vThe relay gate 28, relays 32, cable 33, keyshelf 34, plug shelf 35,rack 36 and cord rack 38 are assembled, connected and Vwired in thefactory, as shown in Fig.. 10, and

shipped on an appropriate frame (not shown) t0 105k the `place ofinstallation, where they are placed in the framework of the switchboardand attached thereto'by the pins, bolts and screws previously'mentioned. The removable parts are inserted through the rear of theswitchboard, which has no horizontal struts or braces to obstruct suchinsertion.

Cords 62 and the customary cord weights 63 are provided in the mannerunderstood by one skilled in the art. A frieze 64 extends along the topportion of the switchboard.

Should it ever become necessary or desirable to alter the equipment in aparticular section or sections of the switchboard assembly, this mayconveniently be done by preparing the new equipment at the factory andshipping it as a unit, wired and ready for operation, to the place whereit is to be used. At any convenient time, the equipment in use isremoved and the new equipment installed in its place, the entirereplacement operation requiring a comparatively short time.

When an original installation of switchboards is made, a position or anynumber of positions may be left blank, with a false keyshelf and cordshelf in place, and such equipment as may be required may be placedtherein at any future time.

The upright members 43 and 44 serve as supports for the switchboard, andas means for connecting adjoining sections. It will be noted thateachsection is equipped with only one of each of these members, on theright-hand side facing the rear of the switchboard. These members thusserve as central supports for two adioining sections. The Vangle irons47, 48 and 49 are also placed on the right-hand side only of eachsection, and when the sections are assembled adjoining sections are heldto their supports by convenient bolts. The roof or cover 50 is of sheetiron plates, and is made sufficiently long to cover the entire assemblyof switchboards, and is bolted to the horizontal members 49 atconvenient points. At each end of the switchboard assembly a panel (notshown) is provided to cover the outside end of the last section. Thepanel which is attached to the left-hand end of the assembly, facing therear ci the switchboards, is provided with members 43, 44, 46, 47, 48and 49, to support the end of the left-hand section.

While I have illustrated and described a preferred embodiment of myinvention it is to be understood that I donot wish to be limited therebyas changes and modications will readily suggest themselves to thoseskilled in the art. I wish to be limited Ytherefore only by the spiritand scope of the appended claims.

Having described my invention, what I claim as new and desire to secureby United States Letters Patent is:

l. A central office telephone switchboard of the character describedcomprising a plurality of sections, each section including a supportingunit and a detachable operating unit, said operating unit consisting ofa keyshelf, relay gate, cord rack, plug shelf, an operators repeatingcoil rack, electrical equipment for said unit and a cableinterconnecting the same.

2. A central oiice telephone switchboard of the character describedcomprising a plurality of sections, each section including a supportingunit and a detachable operating unit, said operating unit comprising arelay rack, a cord rack, an operators repeating coil rack, a plug shelfand a keyshelf wired and assembled as a detachable unit, said supportingunit arranged to permit the insertion of said operating unit as a Whole.

3. A central oflice telephone switchboard including a plurality ofsections, each section consisting of a supporting unit and a detachableoperating unit, each said operating unit comprising a key shelf, relaygate, cord rack and electrical equipment carried thereby wired andassembled as a unit insertable into and detachable from said supportingunit with disassembling.

4. A central office telephone switchboard section, consisting of asupporting unit and a detachable operating unit, said operating unitcomprising a key shelf, relay gate, cord rack and velectrical equipmentcarried thereby wired and assembled as a unit and insertable into anddetachable from said supporting unit without disassembling.

5. In a telephone switchboard, a plurality of sections each comprising asupporting unit and an operating unit, said operating units beingequipped respectively for different classes of service such as localservice and toll service, said supporting units permitting theinterchanging of said operating units without disassembling.

6. In a central oflice telephone switchboard, a plurality of sections,each section including a framework having vertical supports at only oneside, cord circuit apparatus assembled as a unit, certain of said unitscomprising local equipment, and certain of said units comprising tollequipment, said framework permitting the interchanging of said toll andlocal cord circuit equipment without disassembling.

'7. In a telephone switchboard, a plurality of sections, each sectionincluding a framework having vertical supports at only one side,anroperating unit for each section, said units being equipped fordiierent classes of service such as local service and toll service, saidframework permitting the interchanging of said units withoutdisassembling.

GEORGE R. EATON.

Vilse

